Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
CA 02324889 2000-10-31
BRAIDED SHIELD TERMINATING POTTING BACKSHELL
FIELD OF THE INVENTION
The present invention relates, in general, to a
terminating backshell and, more particularly, this invention
relates to a new and improved terminating potting backshell to
which braided shielding can be attached to provide a full 360°
of wire shielding up to the backshell and further having a
relatively short profile which will facilitate such backshell's
connection to a mating connector providing limited space
adjacent thereto. In use, the backshell is intended to
include a potting material to assure that any loose wire fibers
from the braid shield do not contact any of the shielded wires,
while the potting material also adds a degree of environmental
protection and some strain relief to the soldered wire joints.
BACKGROUND OF THE INVENTION
Terminating backshells are generally well known in the
electric and electronic arts as housings which cover and
protect wire, cable and wire harness connections at a connector
that is intended to be connected to a mating receptacle of an
electric or electronic device. Often times, these terminating
backshells are intended to be filled with a potting compound,
such as a non-conductive epoxy or the like, which will protect
soldered wire joints from the environment and to prevent
corrosion, while at the same time providing some degree of
strain relief to soldered wire joints.
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In order to effectively shield the wires from EMI and RFI
interference, it is common practice to provide the wires, cable
or wire harness with a conductive shielding which most commonly
comprises a flexible braided metal conductor through which the
wire, cable or harness pass. However, simple circular potting
backshells to which a braided woven tubular shielding can be
attached for providing 360° of shielding are not available in
a small enough profile to permit easy attachment of the
backshell to a mating receptacle.
SUMMARY OF THE INVENTION
This invention is predicated on the conception and
development of a new and improved terminating potting backshell
adapted to receive a flexible braided metal conductor shield
that will provide a full 360° of wire shielding and further has
a profile short enough in length to permit a braided shield
attached thereto to be bent to facilitate connection of the
terminating backshell to a mating receptacle providing limited
space adjacent thereto. That is to say, commercially available
terminating backshells are rather large in profile which
renders them rather difficult, if not impossible, to be
connected to a mating receptacle where there may be limited
space adjacent the mating receptacle.
OBJECTIVES OF THE INVENTION
Accordingly, it is one of the primary objects of the
present invention to provide a new and improved braided shield
terminating potting backshell.
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Another object of the present invention is to provide a
new and improved terminating backshell to which a braided
shield can be attached to provide 360° of shielding around the
wire, cable or wire harness connections within the backshell.
A further object of the present invention is to provide a
new and improved terminating backshell to which a braided
shield can be attached to provide 360° of shielding around the
wire, cable or wire harness connections within the backshell
and having a simple profile small enough to permit such
backshell's substantially unobstructed attachment to a mating
receptacle of an electrical or electronic device.
In addition to the several objects and advantages of the
present invention which have been described in some detail
above, various additional objectives and advantages of the
instant invention will become more readily apparent to those
persons who are skilled in the relevant electric/electronic
arts from the following more detailed description of the
invention, particularly, when such description is taken in
conjunction with the attached drawing figures as described
below as well as with the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is an elevational view of a presently preferred
embodiment of the terminating potting backshell according to
the invention.
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Figure 2 is a side view of an alternative embodiment of a
terminating potting backshell as it would appear in service
when a braided shield is attached thereto.
Figures 3 and 4 illustrate other alternative embodiments
of a terminating backshell which is indicative of the various
shapes and forms in which the backshell can be provided.
DESCRIPTION OF THE PREFERRED
EMBODIMENT OF THE INVENTION
Reference to Figures 1 and 2 will illustrate a presently
preferred embodiment of the braided shield terminating potting
backshell of this invention. Such backshell preferably
comprises a generally tubular conductive body 10 having a
threading 12 at a first end 14 thereof. Such threading 12 is
provided for the purpose of attaching the backshell to a mating
receptacle of an electric or electronic device (not shown).
Obviously, the threading 12 could be female as well as male and
should have parameters that will permit the backshell to be
attached to a mating receptacle of an electric or electronic
device.
At least one groove or channel 14 encircling the outer
cylindrical surface of such tubular body 10 is spaced from the
second end 16 of tubular body 10 at least sufficient to provide
a rim or flange 18. As shown in the embodiment of Figure 2,
the tubular body 10 is provided with a flange 13 in order to
facilitate manipulation of a manual connecting effort.
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For service as intended, and as illustrated in Figure 2,
a wire, or wires, of a cable or wire harness (not shown) is/are
soldered to one or more pins of a plug type connector (not
shown) within the backshell and a potting material (not shown)
is injected into the backshell which not only serves to
insulate the wires from each other and from the backshell but
also serves to relieve strain on the soldered wires. There are
several well known potting materials available commercially,
any one of which will suffice for the purposes of this
invention.
For adequate protection from EMI and RFI emissions, a
braided shield 20 is slipped over the wires such that the end
of the braided shield 20, encasing the wire or wires, is
disposed over the end of tubular body 10 as well as disposed
over groove 14 and flange 18. A clamp 22 is then clamped
within such groove 14 with the braided shield 20 thereunder, as
is shown in Figure 2. In the alternative embodiment to a clamp
22, a shrink tube 24 may be utilized to hold the braided shield
20 onto the second end 16 of the tubular body 10.
While the use of a simple tubular embodiment of the
backshell of the present invention has been disclosed, it
should be apparent that modifications or other features could
be incorporated therein without departing from the spirit of
the invention. For example, while the backshell itself is
shown, in Figures 1 and 2, to be of a cylindrical tubular form,
obviously other forms and shapes could be utilized such as an
CA 02324889 2000-10-31
elbow form, as shown in Figure 3, or a tubular form having
different diameters at each end thereof, as shown in Figure 4.
In addition, the groove 14 could be provided in any of a
number of different cross-sectional forms. While the groove 14
is shown in Figures 1 and 2 to have a rectangular cross-
section, it should be apparent that other cross-sectional forms
could be utilized in combination with a variety of different
cross-sectional forms for the clamp 22, keeping in mind that
all that is necessary is for clamp 22 to press an end of the
braided shield 20 into groove 14 so that it is securely
attached thereto to provide a permanent shield around the wires
joined within tubular body 10.
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